双氧水改性二氧化钛的光催化性能研究

研究了用微乳法制备纳米二氧化钛粉末的工艺，以及在紫外光照射下，TiO2和H2O2分别以及两者结合对于甲基橙溶液的降解作用。结果表明用微乳法可以制备粒度为23．2nm的纳米TiO2粉末；在紫外光照射下，H2O2可以有效地降解甲基橙溶液；当H2O2浓度从1mmol／L增加到10mmol／L，甲基橙的吸光度直线下降；当H2O2浓度达到10mmol／L时，降解率可以达到99％；TiO2也可以有效地降解甲崔橙溶液，当TiO2的浓度为0．50～0．75g／L时，降解率最大；用H2O2对TiO2进行改性后，可以有效地降解甲基橙溶液，固定TiO2的量为0．5g／L时，当H202浓度为4mmol／L时，甲基橙溶液的吸光度达到最低；当H2O2浓度处于10mmol／L以上时，甲基橙溶液的吸光度却出现无规则的变化。

The Photocatalytic Properties of H2O2 Modified Titania

The degradation of methyl orange solution under ultra-violet radiation for TiO2, H2O2, respectively and together has been investigated. The results show that H2O2 can effectively degrade methyl orange under the ultra-violet radiation. When the concentration of H2O2 increases, the adsorption of methyl orange solution declines; when the concentration reaches 10 mmol/1, the degradation rate is 99%. TiO2 can also degrade methyl orange solution, and when the concentration is between 0.5 g/1 and 0.75 g/l, degradation rate is the highest. H202 modified TiO2 can effectively degrade methyl orange solution, and when the amount of TiO2 is 0.5 g/l, and concentration of H2O2 is 4 mmol/1, the adsorption is the lowest; when the concentration of H2O2 is higher than 10mmol/1, the adsorption of methyl orange solution is irregular.